Hydrodynamic limit for the Ginzburg–Landau ∇ϕ interface model with non-convex potential

Jean-Dominique Deuschel, Takao Nishikawa and Yvon Vignaud

Stochastic Processes and their Applications, 2019, vol. 129, issue 3, 924-953

Abstract: The hydrodynamic limit of the Ginzburg–Landau ∇ϕ interface model was derived in Funaki and Spohn (1997) and Nishikawa (2003) for strictly convex potentials. This paper deals with non-convex potentials under suitable assumptions on the free energy and identification of the extremal Gibbs measures which have been recently established at sufficiently high temperature in Cotar and Deuschel (2012). Because of the non-convexity, many difficulties arise, especially, on the identification of equilibrium states. We show the equivalence between the stationarity and the Gibbs property under quite general settings, and we complete the identification of equilibrium states. We also establish some uniform estimates for variances of extremal Gibbs measures.

Keywords: Ginzburg–Landau model; Effective interfaces; Massless fields (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1016/j.spa.2018.03.025

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